fan PWM frequency
I have these fans for print cooling: XYJ24B3010H from XINYUJIE electronics, but they refuse to turn on any other setting than 100% (M106 S255).
Other type of fans on the same connection can be modulated. The board output voltage is OK, for example M106 S128 gives 13V and M106 S255 gives 24V.
In the configuration.h file setting PDM instead of PWM reduces fan power, but still only works at 100%.
The fan supplier does not react to my request for info.
Changing to another type of fan is not preferred, so I'm looking for a way to control the PWM speed in Repetier. Maybe changing the frequency could help.